Node.js 如何异步返回sequelize实例？

我似乎无法正确地将

service.js

文件中的

sequelize

对象传递到

index.js

sequelize变量

有什么不对劲的地方吗

index.js

let sequelize;
let contractModel;

(async () => {
    sequelize = await lambdaHelper.init(); //The issue is here
    contractModel = require('./models/Contract')(sequelize, Sequelize); 
})();

exports.init = async () => {
    let sequelize = await new Sequelize(process.env.FNI_DATABASE, process.env.FNI_USER, process.env.FNI_PASSWORD, {
        host: process.env.FNI_HOST,
        dialect: 'mysql',
        operatorsAliases: false,
        define: {
            timestamps: false,
            freezeTableName: true
        },

        pool: {
            max: 5,
            min: 0,
            acquire: 30000,
            idle: 10000
        }

    });
    return sequelize;
};

service.js

let sequelize;
let contractModel;

(async () => {
    sequelize = await lambdaHelper.init(); //The issue is here
    contractModel = require('./models/Contract')(sequelize, Sequelize); 
})();

exports.init = async () => {
    let sequelize = await new Sequelize(process.env.FNI_DATABASE, process.env.FNI_USER, process.env.FNI_PASSWORD, {
        host: process.env.FNI_HOST,
        dialect: 'mysql',
        operatorsAliases: false,
        define: {
            timestamps: false,
            freezeTableName: true
        },

        pool: {
            max: 5,
            min: 0,
            acquire: 30000,
            idle: 10000
        }

    });
    return sequelize;
};

service2.js 以下代码同步工作

exports.init = () => new Sequelize(process.env.FNI_DATABASE, process.env.FNI_USER, process.env.FNI_PASSWORD, {
    host: process.env.FNI_HOST,
    dialect: 'mysql',
    logging: false,
    operatorsAliases: false,
    define: {
        timestamps: false,
        freezeTableName: true
    },

    pool: {
        max: 5,
        min: 0,
        acquire: 30000,
        idle: 10000
    }

});

结果

let sequelize;
let contractModel;

(async () => {
    sequelize = await lambdaHelper.init(); //The issue is here
    contractModel = require('./models/Contract')(sequelize, Sequelize); 
})();

exports.init = async () => {
    let sequelize = await new Sequelize(process.env.FNI_DATABASE, process.env.FNI_USER, process.env.FNI_PASSWORD, {
        host: process.env.FNI_HOST,
        dialect: 'mysql',
        operatorsAliases: false,
        define: {
            timestamps: false,
            freezeTableName: true
        },

        pool: {
            max: 5,
            min: 0,
            acquire: 30000,
            idle: 10000
        }

    });
    return sequelize;
};

***********在*******（节点：66912）之前未处理的PromiserEjectionWarning:未处理的承诺拒绝 （拒绝id:1）：TypeError:无法读取的属性“findAll” 未定义（节点：66912）[DEP0018]弃用警告：未处理的承诺 不赞成拒绝。在未来，承诺拒绝 not handled将以非零出口终止Node.js进程 代码

结果2

***********在*******（节点：66540）之前未处理的PromiserEjectionWarning:未处理的承诺拒绝 （拒绝id:1）：TypeError:无法读取的属性“findAll” 未定义（节点：66540）[DEP0018]弃用警告：未处理的承诺 不赞成拒绝。在未来，承诺拒绝 not handled将以非零出口终止Node.js进程 代码。正在执行（默认）：选择1+1作为结果类型错误：无法读取 未定义的属性“define” at module.exports at

wait new Sequelize（…）

在上面的代码中，期望

new Sequelize

返回承诺，但事实并非如此。有一种方法可以做到这一点

应该是：

exports.init = async () => {
    let sequelize = new Sequelize(...);
    await sequelize.authenticate();
    return sequelize;
};

确保承诺拒绝始终得到妥善处理：

(async () => {
    sequelize = await lambdaHelper.init();
    contractModel = require('./models/Contract')(sequelize, Sequelize);
})().catch(console.error);

---

请参见OP2中的结果2添加

验证
和
捕获
后是否会发生这种情况？导致问题的代码未出现在OP.1中的建议错误之后change@Rod刚刚注意到
authenticate
不应该返回连接，更新了答案。不确定它是否会影响你的问题。很高兴它起到了作用。